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Full Discussion: Adding text to file on certain lines with(special characters)
Top Forums Shell Programming and Scripting Adding text to file on certain lines with(special characters) Post 302380508 by durden_tyler on Tuesday 15th of December 2009 11:11:57 AM
Old 12-15-2009
Your Perl program is incorrect syntax-wise. You may want to look up basic conditions and loop structures in the documentation or a good textbook.

Maybe this is what you are looking for -

Code:
$
$ cat -n f7
     1  this is line 1
     2  this is line 2
     3  this is line 3
     4  this is line 4
     5  this is line 5
     6  this is line 6
     7  this is line 7
     8  this is line 8
     9  this is line 9
    10  this is line 10
$
$
$ perl -lne 'BEGIN {$RM="BLAH"}
             if ($. == 3) {print qq(RM="rm2")}
             elsif ($. == 5) {print qq($RM)}
             elsif ($. == 7) {print qq(rmdesc="Result process")}
             else {print}' f7
this is line 1
this is line 2
RM="rm2"
this is line 4
BLAH
this is line 6
rmdesc="Result process"
this is line 8
this is line 9
this is line 10
$
$

tyler_durden
 

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LEARN ABOUT OSF1

colcrt

colcrt(1)						      General Commands Manual							 colcrt(1)

NAME

       colcrt - Filters text processor output for screen previewing

SYNOPSIS

       colcrt [- -2] [file...]

       The colcrt command filters output from text processors such as nroff so that it can be previewed on a cathode ray tube (CRT).

OPTIONS

       Suppresses  underlining; this is useful for previewing boxed tables from tbl.  Causes all half-lines to be printed, effectively doublespac-
       ing the output.	This is useful when printing output with subscripts and superscripts on a line printer, where half-lines do  not  normally
       appear.

DESCRIPTION

       The  colcrt command provides virtual half-linefeed and reverse linefeed sequences for terminals without such capability, and on which over-
       striking is destructive. The colcrt command changes underline characters to dashes and places them and half-line characters on new lines in
       between the normal output lines.

NOTES

       colcrt  cannot  back up more than 102 lines.  General overstriking is lost; as a special case a | (vertical bar) overstruck with a - (dash)
       or _ (underline) becomes a + (plus sign).  Lines are trimmed to 132 bytes.

EXAMPLES

       The following command line illustrates a typical use of colcrt: tbl exum2.n | nroff -ms | colcrt - | more

SEE ALSO

       Commands:  col(1), deroff(1), more(1), neqn(1), nroff(1), pg(1), tbl(1), ul(1)

																	 colcrt(1)
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